Kohana 3.3 upgrade

Hello,

I've been using your module for one of my projects and it's very useful, however it's currently not compatible with Kohana 3.3.

So I've made a few changes so that it runs in Kohana 3.3 without a problem - mainly changing the name of some files from lowercase to uppercase and updating a few function calls.

I've also fixed [this issue](https://github.com/ajaxray/Kohana-Log-Viewer/issues/3) since I got it too with one of my log files, and of course, [this issue](https://github.com/ajaxray/Kohana-Log-Viewer/issues/5) is fixed too.

Hope the changes can be useful, if you have any query, feel free to let me know..